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- W855831401 abstract "In this work an integrated set of numerical methods is developed for the analysis of gasturbine combustors, which can predict the flow, temperature and stress fields in moderngeometrically complex combustor walls.A key problem for accurate flow and temperature field prediction is the wide range ofgeometric length scales within modern combustor components. These componentstypically contain multiple small-scale cooling features such as pedestals and effusioncooling holes, which cannot be resolved by a computational mesh without incurringhuge penalties in terms of computer processor and memory requirements. In this work asub-grid-scale model is developed, which accounts for the effects of small-scalefeatures such as pedestals without resolving them in the computational mesh. Validationof this model using experimental results from the literature shows that the pressuredrop, turbulence generation and heat transfer effects of pedestal arrays can besuccessfully modelled using this approach.Another difficulty in the analysis of combustors is coupling the interdependenttemperature field predictions in the fluid and solid regions. This has led to a unifiedapproach to conjugate heat transfer prediction being adopted in this work, whereby astructured finite volume solver is used to predict temperature fields throughout fluidand solid domains. A new conjugate heat transfer discretisation scheme is developed,which can cope with the demanding combination of strong temperature gradientdiscontinuities and highly skewed grids. Several test cases are presented whichdemonstrate the accuracy of this new scheme, as well as demonstrating the inadequacyof conventional treatment of the diffusive fluxes for the solution of conjugate problems.The assembled numerical methods are used to predict the flow, thermal and stress fieldsin a geometrically complex combustor heatshield/backplate assembly, typical of thatfound in modern engines. This calculation shows that a viable route to computationallife prediction has been established." @default.
- W855831401 created "2016-06-24" @default.
- W855831401 creator A5047501073 @default.
- W855831401 date "2003-01-01" @default.
- W855831401 modified "2023-09-28" @default.
- W855831401 title "Numerical prediction of flow, thermal and stress fields in gas turbine combustor components" @default.
- W855831401 hasPublicationYear "2003" @default.
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